A beautiful crystalline compound, silicon carbide (SiC), consisting of carbon and silicon in combination; -- also called carbon silicide. It is made by heating carbon and sand together in an electric furnace. The commercial article is dark-colored and iridescent. It is harder than emery, and is used as an abrasive.
Commercial form of silicon carbide, an abrasive powder used to create tonal areas on plates or to grain litho stones.
An abrasive powdered mixture, primarily silicon carbide, used to produce a dotted or tonal effect when the plate is passed through a press. Similar to a sandpaper ground.